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Awesome reply.  That makes a lot of sense...

If only the information I found when I googled that question was that simply stated.

Thanks!!

UPDATE..  I added a 1k resistor in series with the input to the PCB and added shielded wire for the input and output and the whine has decreased.  The gain is able to be turned up higher now before the whine.  I plan on ordering the different charge pumps you mentioned to try and have on hand.  My question is what is the difference between the SCPA and CPA?  I ordered the Max1044CPA from Small Bear and now I am looking at ordering the TC1044SCPA from Mouser, but was just curious of the difference.  After originally posting, I have found a great deal of information regarding this whining sound and it seems like it occurs on a few different pedals that use the Max1044CPA charge pump. 

Thanks again!

Jason

Sorry to keep digging up an older thread.   

You mentioned that you added a 1k resistor and used shielded cable for the input and output.  Let me ask this question.  Do you use shielded cable from the input from the input jack through the footswitch to the PCB, then to the same for the output, from the PCB through the footswitch to the output jack?  Basically anything input or output not connected on the circuit board gets wired with shielded cable?

Also, did you connect the shield to anything (i.e. ground or case) or just simply use a cable with a shield?

Just wanted to clarify.  I added the 1k resistor and still have the whine, so I was going to try the shielded cable tonight, because I would really like to start using this pedal.  Also, I think Jacob mentioned trying a different charge pump, which is next on the list to try if this doesn't work, but I have shielded cable, but no charge pump on hand.

Thanks,
Jason

BUMP... Audio Ware did you find anything regarding this issue?

I don't have any guitars with active pickups, only passive.  It works fine at lower gain, but squeals/whines at higher gains.  I started a thread in the general questions section last night, but then stumbled across this thread this morning, so sorry for the duplicate. I guess I should have performed a better search.


Thanks..

I was searching the forum a little bit better and stumbled across this old thread...

http://www.madbeanpedals.com/forum/index.php?topic=2290.0

Gonna try some of these things tonight and will re-post any findings.

Thanks.

Jason

Looks like a Maxim Max1044   CPA1113.  That is all the information on the chip.

Not sure if this information helps, but I checked the voltage at the Charge Pump outputs and I get + 9VDC and -8.9 VDC.

Thanks for the assistance..

Hey all,

I have a question regarding the boneyard.  I have built a boneyard, but now have a higher pitch squealing sound when I turn the gain up much past about 50k.  It seems to sound good with the gain pot lower, then once it is turned up it squeals really badly.  It isn't like a feedback squeal, but more of a constant high pitch, annoying as hell squeal.  I touch around on the vero board and can induce new sounds or squeals, but can't seem to identify the source of this problem.  With the gain pot set low it is working, so that tells me the circuit works ok, right?  Do I need to ground the enclosure?

I have checked the connections about 10 times and everything seems to be ok.  I have checked the resistance that the circuit sees in the feedback loop, from input to output and can see the resistance change when turning the pot, so all the connections seems to be ok.

Any ideas as to what I should be looking for as an issue?  I am pretty much stumped.

Thanks!

I was thinking the same thing about the Clean Boost only function of the Boneyard.  I will attach a schematic showing how I made mine.  I had it on a breadboard and it sounded really good like this.  I have a AMZ mosfet boost clone, and I thought the boost sounded similar to that pedal and I was very impressed.

It is switch 2 on the schematic.  I used a DPDT toggle switch to manually allow switching from normal circuit operation or boost only, which still maintains the input impedance and buffer, but then immediately switches out the gain/clipping portion of the circuit after the first op-amp stage/buffer through the volume pot and then switches in the series resistor/cap before the input of the boost stage op-amp.  It works great and now the pedal is even more versatile (as if it wasn't already) and I can leave my other boost pedal in the loop, so I can use this boost for boosting the input of my amp.   

There are probably better ways to do this, but this is what I had come up with, so I figured I would share it with you guys.

Hey all,

This is my first post on the forum, but I have been breadboarding some of the pedals.  I currently have a boneyard breadboarded that I would like to get into an enclosure and was wondering if anyone has a Boneyard PCB for sale or when they might be available through the website.

I am debating on building one on a vero board or etching my own, but figured I would check this route first.

Thanks,
Jason